Upgrade the ignition system of your 1948-1974 Big Twin motorcycle with Drag Specialties Spark Plugs, manufacturer part number E18-6664SDS and vendor part number E18-6664SDS. Designed for compatible Big Twin applications, these spark plugs combine dependable construction with materials selected for heat resistance, electrical insulation, and long service life.
The black ceramic body with bold red Drag Specialties branding provides a distinctive appearance, while the insulator is manufactured from 95% pure alumina for strong resistance to heat shock and reliable insulation. The multi-rib insulator design helps reduce the possibility of flashover, supporting consistent ignition performance under demanding operating conditions.
Each E18-6664SDS spark plug features a nickel-plated housing to help resist oxidation and corrosion. Multilayer gaskets and a heat-crimping manufacturing process provide a leak-free, gas-tight fit. The copper core electrode delivers effective electrical and heat conductivity while helping prevent oxidation and corrosion, contributing to dependable spark delivery and extended service life.
These Drag Specialties spark plugs are intended for fitment on select 1948-1974 Big Twin motorcycles. Verify the motorcycle model, engine application, and original-equipment specifications before installation to ensure proper compatibility.
Features:
- Fitment: Designed for select 1948-1974 Big Twin motorcycle applications
- Brand: Drag Specialties
- Manufacturer Part Number: E18-6664SDS
- Vendor Part Number: E18-6664SDS
- Insulator: 95% pure alumina construction resists heat shock and provides strong electrical insulation
- Insulator Design: Multi-rib profile helps reduce flashover
- Housing: Nickel-plated finish helps protect against oxidation and corrosion
- Sealing: Multilayer gaskets and heat-crimping process provide a leak-free, gas-tight fit
- Electrode: Copper core supports electrical and heat conductivity while resisting oxidation and corrosion
- Appearance: Black ceramic body with red Drag Specialties logo and script